Before science and spirituality became dis-integrated, separate explorations (in the past 200 years), they were tightly intertwined and integrated for thousands of years in the practice of ALCHEMY. Just as alchemists (yogis were among the first and best alchemists!) tried to transmutate lesser metals into gold, they also sought to improve and perfect their bodies and minds. Eventually, the process became quite standardized across cultures along both chemical and psychological dimensions.